Answer: D. Up and to the right
Step-by-step explanation:
Answer:
Washer = $616, Dryer = $308
Step-by-step explanation:
When something is twice the cost of something else but add up to be a total number that means 2/3rds is one item and 1/3 is the other.
924 / 3 = 308
308 * 2 = 616
308 + 616 = 924
Substitute this into the parabolic equation,
We're told the line 
intersects 
twice, which means the quadratic above has two distinct real solutions. Its discriminant must then be positive, so we know
We can tell from the quadratic equation that has its vertex at the point (3, 6). Also, note that
and
so the furthest to the right that extends is the point (5, 2). The line passes through this point for 
. For any value of 
, the line passes through either only once, or not at all.
So 
; in set notation,
We can simplify 2√5+3√5-√5 because they all have the same radical, √5. Now that we know this, we can imagine that there are no radicals, and that we are just adding numbers. This results in our expression being 2 + 3 - 1. This gives an answer of 4. Finally, we add the √5 to the 4 to get 4√5.
